多选如图甲所示电阻r的阻值为50Ω在ab间加上图乙所示的正弦交流电则下面说法中错误的是a.电阻r的功率为400w B.电流表示数为2a Template




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tomski多选如图甲所示电阻r的阻值为50Ω在ab间加上图乙所示的正弦交流电则下面说法中错误的是a.电阻r的功率为400w b.电流表示数为2a coloring